This document discusses barriers to effective communication. It identifies several types of barriers, including bad expressions, inaccurate translations, unclarified assumptions, distrust, premature evaluation, physical noise, and distractions. Bad expressions can include verbosity, inaccuracies, omissions and uncertainties. Inaccurate translations may lead to inadequate understanding if information is not translated properly before transmission. Unclarified assumptions and vague language can also impede communication. Distrust of the speaker can influence how the message is received. Premature evaluation occurs when the receiver begins reacting before the full communication is received. Physical noise and distractions can reduce the clarity and effectiveness of the exchange.